Pump attachment



M. R. DONNALLAN Feb. 11, 1930.

PUMP ATTACHMENT Filed' Aug. 25, 1928 ATTORNEY.

Patented Feb. 11, 1930 UNITED STATES PATENT OFFICE MARTIN ROBERT DONNALLAN, OF LONG BEACH, CALIFORNIA, ASSIGNOR OF ONE-HALF TO NORMA RUTH DONNALLAN, OF LONG BEACH, CALIFORNIA PUMP ATTACHMENT Application filed August 25, 1928.

This invention relates to a pump attachment, designed primarily for use in connection with mud pumps employed for the eX- traction of the formation which is necessarily attendant in oil well drilling operations, but

it is to be understood, however, that a pump attachment in accordance with this invention may be employed for any purposes wherein it is found applicable, and the invention has for its object to provide, in a manner as hereinafter set forth, a pump attachment of the screen type including a valvular element that opens when the pump is started and closes when it is stopped so that the pump will hold its prime and to further provide a pump attachment of the screen type for increasing the life of the valves, valve seats and inserts, as well as preventing any retardation or interruption of the operation, of the pump by the elimination of the entrance of rock, gravel, wood chips, which ordinarily would with the suction applied, enter into the pump and cause thereby the clogging thereof, injury to the valves, as well as to the valve seats and inserts, and which further requires a constant taking of the pump apart, the replacement of the valve and the valve seats, but more especially the valve seats and inserts.

A further object of the invention is to provide, in a manner as hereinafter set forth, a pump attachment of the valvular screen type for the purpose referred to and which is simple in its construction and arrangement, strong, durable, capable of being quickly arranged in operative relation with respect to the pump and removed therefrom when occasion so requires, thoroughly efficient in its use. and comparatively inexpensive to install.

lVith the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts, as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference Serial No. 302,058.

characters denote corresponding parts throughout the several views Figure 1 is a sectional elevation of a pump attachment in accordance with this invention.

Figure 2 is a fragmentary view in cross section of the attachment.

Figure 3 is a section on line 3-3 of Figure 1.

' Figure 4 is a perspective view of the sup port for the pivot of the valve member.

Figure 5 is a perspective view of a valve member.

Referring to the drawings in detail 1 denotes the main shaft of a pump and which is adapted to have secured against the inlet end thereof an attachment in accordance with this invention.

The attachment includes a collar 2 provided with a pair of diametrically opposed, laterally extending lugs 3,4, arranged in-the same plane andeach provided with a verti cally disposed opening 5 having its lower end communicating with a semi-spherical recess 6 providing a seat for a purpose to bepresently referred to. The upper ends of the openings 5 are at the tops of the lugs and the mouths of the recesses 6 are at the bottoms of the lugs. V The wall of the opening provided by the collar 2 is of different diameters to form a shoulder 7, intermediate the upper and lower ends of such wall. That part of the wall of the opening formed by the collar 2 and which is arranged above the shoulder 7 is of materially greater diameter than that part of the wall arranged below the shoulder 7. The part of largest diameter of such wall is indi cated at 8 and the part of smaller diameter is bevelled as at 9 to provide a valve seat. The inlet end of the main shaft for the pump is seated against the shoulder 7. The outer diameter of the shaft 1 corresponds to the diameter of the part 8 of the opening formed by the collar 2. The part 8 of such wall snugly fits the periphery of the'shaft 1. The inner face of the shaft 1 is spaced from the seat 9.

Formed integral with the collar 2, as Well as depending therefrom is a foraminous memher of semi-spherical contour and which is indicated at 10. The diameter of the upper end of the member 10 is greater than the diameter of the opening formed by the collar 2. The member 10 is perforated throughout, as indicated at 11.

Extending through the collar 2 in proximity to the seat 9, but spaced therefrom is a threaded stud 12 terminating at its upper end in an upstanding, inwardly inclined apertured lug 13. The aperture in the lug 13 is indicated at 14. The stud 12 extends down through the collar 2 and carries on its lower end a securing nut 15, which when screwed home and in connection with the stud 12 clamps the latter against the shoulder 7. For the purpose of closing the opening formed by the collar 2, when the pump is not operating,

a valve member 16 is provided with a bevelled edge 17. The valve member 16 is adapted to engage the seat 9 for the purpose of closing the collar 2. The valve member 16 has its upper face, centrally thereof, provided with an enlargement 18 and extending radially therefrom is an arm 19 terminating in a yoke 20. The arms of the yoke 20 are apertured as at 21. The stud 12 extends between the arms of the yoke 20 and its aperture aligns with the apertures 21.

' Extending through the aligning apertures is a pivot pin 22 for the valve member 16.

The collar 2 is detachably connected with the shaft 1, through the medium of a com bined coupling and clamping device, and

which includes a pair of coupling rods 23,

24 and each of which has its lower terminal portion peripherally threaded as at 25 and its upper terminal portion peripherally threaded as at 26. Threadedly engaging with the threads 25 of each rod is a spherical member 27 and throughwhich the rod extends. The spherical members 27 are adapted to engage the seats provided by the recesses 6 and are adjustable lengthwise with respect to the rods 23, 24. Engaging with the threads 25 of the rods 23, 24 are clamping nuts 28 for engagement with the upper faces of the studs 3, 4, whereby the rods 23, 24 are clamped to the studs 3, 4. The nuts 28 coact with the members 27 to provide for the clamping of the rods 23, 24 to thecollar 2.

Engaging with the threaded portions 26 of the rods 23, 24 are clamping nuts 29 of the wing type and positioned against said nuts are washers 30. Threadedly engaging with the portions 26 of the rods 23, 24 are securing nuts 31. Surrounding the shaft 1 are oppositely disposed clamping members, only one of which is shown and which is indicated at 32. The nuts 29 and 31 coact with the clamping members 32 for the purpose of anchoring the rods 23, 24 to shaft 1 and further for maintaining the collar 2 in clamping engagement with respect to the intake end of the shaft 1. The combined clamping and coupling device referred to is as disclosed in Letters Patent 1,502,552, granted to me July 22, 1924, with the exception of the nuts 28 and the provision for adjusting the members 27.

The spherical members 27, at the lower ends of the rods 23, 24 in connection with the seat against which they bear provide fulcrums upon which the rods 23, 24 can be shifted thereby facilitating the removal of the rods between the clamping members 32 when desired to disconnect the collar 2 from the intake end of the shaft 1.

The providing of the collar 2 with a valve that opens when the pump is started and closes when the pump is stopped provides for the pump holding its prime and owing to the arrangement of the attachment foreign substances are prevented from entering the shaft 1, and therefore it is thought the many advan-' tages of a pump attachment in acordance with this invention, can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood that changes in the details of construction can be had which fall within the scope of the invention as claimed.

hat I claim is:

1. In an attachment for the purpose set forth a collar provided approximately centrally of its inner face with an annular right angularly disposed, fiat shoulder adapted to be clamped in abutting relation against the edge of a pump shaft at the intake end of the latter and of a width to project inwardly from the inner face of said shaft, said collar further formed on its inner face with a beveled valve seat depending from the free end of said shoulder, a pivot support extended upwardly from said shoulder in proximity to said valve seat and arranged at that part of said shoulder which extends inwardly from the inner face of the shaft, means extending through the collar for anchoring said support thereto, a shiftable, beveled valve engaging said seat for closing the collar, an inclined arm projecting from the upper face of the valve and overlapping said shoulder, and means to provide a pivotal connection between said arm and support.

2. In an attachment for the purpose set forth a collar provided approximately centrally of its inner face with an annular right angularly, flat shoulder adapted to be clamped in abutting relation against the edge of a pump shaft at the intake end of the latter and of a width to project inwardly from the inner face of said shaft, said collar further formed on its inner face with a beveled valve seat depending from the free end of said shoulder, a pivot support extended upwardly from said shoulder in proximity to said valve seat and arranged at the part of said shoulder which extends inwardly from the inner face of the shaft, means extending through the collar for anchoring said support thereto, a shiftable, beveled valve engaging said seat for closing the collar, an inclined arm projecting from the upper face of the valve and overlapping said shoulder, and means to provide a pivotal connection between said arm and support, said support extending toward said Valve seat at an inclination.

3. In a pump attachment of that type adapted to be clamped against the intake end of a pump shaft, a collar having its inner face formed of two portions of different diameters, a beveled portion and a shoulder connecting the inner end of the portion of larger diameter to the upper end of the beveled portion, said beveled portion gradually decreasing in diameter from the free end of said shoulder, providing a valve seat and having its lower end terminating in the upper end of the portion of smallest diameter, said shoulder adapted to be clamped against the edge of said shaft at the intake end of the latter, an inclined pivot support clamped-to the collar and overhanging said shoulder inwardly of the shaft in a direction toward the valve seat, a valve having edge engagement with said seat to close the collar, said edge portion of said valve being of less width than the height of said seat, a radially extending arm at the top of the valve, said arm having its outer end straddling said support, and a pivot between said arm and support.

In testimony whereof, I aflix my signature hereto. lVLARTIN ROBERT DONNALLAN. 

